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a82bcb3107
2005-04-29 Matthias Clasen <mclasen@redhat.com> * gobject.symbols: * gboxed.h (G_TYPE_DATE): * gboxed.c: Add a boxed type for GDate. (#301787, Tim-Philipp Müller)
556 lines
14 KiB
C
556 lines
14 KiB
C
/* GObject - GLib Type, Object, Parameter and Signal Library
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* Copyright (C) 2000-2001 Red Hat, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General
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* Public License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place, Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#include "gboxed.h"
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#include "gbsearcharray.h"
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#include "gvalue.h"
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#include "gvaluearray.h"
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#include "gclosure.h"
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#include "gvaluecollector.h"
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#include "gobjectalias.h"
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#include <string.h>
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/* --- typedefs & structures --- */
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typedef struct
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{
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GType type;
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GBoxedCopyFunc copy;
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GBoxedFreeFunc free;
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} BoxedNode;
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/* --- prototypes --- */
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static gint boxed_nodes_cmp (gconstpointer p1,
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gconstpointer p2);
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/* --- variables --- */
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static GBSearchArray *boxed_bsa = NULL;
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static const GBSearchConfig boxed_bconfig = {
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sizeof (BoxedNode),
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boxed_nodes_cmp,
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0,
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};
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/* --- functions --- */
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static gint
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boxed_nodes_cmp (gconstpointer p1,
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gconstpointer p2)
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{
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const BoxedNode *node1 = p1, *node2 = p2;
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return G_BSEARCH_ARRAY_CMP (node1->type, node2->type);
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}
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static inline void /* keep this function in sync with gvalue.c */
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value_meminit (GValue *value,
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GType value_type)
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{
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value->g_type = value_type;
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memset (value->data, 0, sizeof (value->data));
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}
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static gpointer
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value_copy (gpointer boxed)
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{
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const GValue *src_value = boxed;
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GValue *dest_value = g_new0 (GValue, 1);
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if (G_VALUE_TYPE (src_value))
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{
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g_value_init (dest_value, G_VALUE_TYPE (src_value));
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g_value_copy (src_value, dest_value);
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}
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return dest_value;
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}
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static void
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value_free (gpointer boxed)
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{
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GValue *value = boxed;
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if (G_VALUE_TYPE (value))
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g_value_unset (value);
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g_free (value);
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}
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static gpointer
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gdate_copy (gpointer boxed)
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{
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const GDate *date = (const GDate*) boxed;
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return g_date_new_julian (g_date_get_julian (date));
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}
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static gpointer
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gstring_copy (gpointer boxed)
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{
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const GString *src_gstring = boxed;
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return g_string_new_len (src_gstring->str, src_gstring->len);
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}
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static void
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gstring_free (gpointer boxed)
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{
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GString *gstring = boxed;
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g_string_free (gstring, TRUE);
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}
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void
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g_boxed_type_init (void)
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{
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static const GTypeInfo info = {
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0, /* class_size */
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NULL, /* base_init */
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NULL, /* base_destroy */
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NULL, /* class_init */
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NULL, /* class_destroy */
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NULL, /* class_data */
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0, /* instance_size */
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0, /* n_preallocs */
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NULL, /* instance_init */
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NULL, /* value_table */
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};
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const GTypeFundamentalInfo finfo = { G_TYPE_FLAG_DERIVABLE, };
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GType type;
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boxed_bsa = g_bsearch_array_create (&boxed_bconfig);
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/* G_TYPE_BOXED
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*/
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type = g_type_register_fundamental (G_TYPE_BOXED, "GBoxed", &info, &finfo,
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G_TYPE_FLAG_ABSTRACT | G_TYPE_FLAG_VALUE_ABSTRACT);
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g_assert (type == G_TYPE_BOXED);
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}
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GType
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g_closure_get_type (void)
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{
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static GType type_id = 0;
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if (!type_id)
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type_id = g_boxed_type_register_static ("GClosure",
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(GBoxedCopyFunc) g_closure_ref,
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(GBoxedFreeFunc) g_closure_unref);
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return type_id;
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}
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GType
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g_value_get_type (void)
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{
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static GType type_id = 0;
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if (!type_id)
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type_id = g_boxed_type_register_static ("GValue",
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value_copy,
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value_free);
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return type_id;
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}
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GType
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g_value_array_get_type (void)
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{
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static GType type_id = 0;
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if (!type_id)
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type_id = g_boxed_type_register_static ("GValueArray",
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(GBoxedCopyFunc) g_value_array_copy,
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(GBoxedFreeFunc) g_value_array_free);
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return type_id;
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}
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GType
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g_date_get_type (void)
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{
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static GType type_id = 0;
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if (!type_id)
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type_id = g_boxed_type_register_static ("GDate",
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(GBoxedCopyFunc) gdate_copy,
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(GBoxedFreeFunc) g_date_free);
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return type_id;
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}
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GType
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g_strv_get_type (void)
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{
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static GType type_id = 0;
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if (!type_id)
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type_id = g_boxed_type_register_static ("GStrv",
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(GBoxedCopyFunc) g_strdupv,
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(GBoxedFreeFunc) g_strfreev);
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return type_id;
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}
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GType
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g_gstring_get_type (void)
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{
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static GType type_id = 0;
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if (!type_id)
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type_id = g_boxed_type_register_static ("GString", /* the naming is a bit odd, but GString is obviously not G_TYPE_STRING */
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gstring_copy,
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gstring_free);
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return type_id;
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}
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static void
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boxed_proxy_value_init (GValue *value)
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{
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value->data[0].v_pointer = NULL;
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}
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static void
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boxed_proxy_value_free (GValue *value)
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{
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if (value->data[0].v_pointer && !(value->data[1].v_uint & G_VALUE_NOCOPY_CONTENTS))
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{
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BoxedNode key, *node;
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key.type = G_VALUE_TYPE (value);
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node = g_bsearch_array_lookup (boxed_bsa, &boxed_bconfig, &key);
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node->free (value->data[0].v_pointer);
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}
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}
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static void
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boxed_proxy_value_copy (const GValue *src_value,
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GValue *dest_value)
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{
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if (src_value->data[0].v_pointer)
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{
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BoxedNode key, *node;
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key.type = G_VALUE_TYPE (src_value);
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node = g_bsearch_array_lookup (boxed_bsa, &boxed_bconfig, &key);
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dest_value->data[0].v_pointer = node->copy (src_value->data[0].v_pointer);
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}
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else
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dest_value->data[0].v_pointer = src_value->data[0].v_pointer;
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}
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static gpointer
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boxed_proxy_value_peek_pointer (const GValue *value)
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{
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return value->data[0].v_pointer;
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}
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static gchar*
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boxed_proxy_collect_value (GValue *value,
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guint n_collect_values,
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GTypeCValue *collect_values,
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guint collect_flags)
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{
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BoxedNode key, *node;
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key.type = G_VALUE_TYPE (value);
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node = g_bsearch_array_lookup (boxed_bsa, &boxed_bconfig, &key);
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if (!collect_values[0].v_pointer)
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value->data[0].v_pointer = NULL;
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else
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{
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if (collect_flags & G_VALUE_NOCOPY_CONTENTS)
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{
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value->data[0].v_pointer = collect_values[0].v_pointer;
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value->data[1].v_uint = G_VALUE_NOCOPY_CONTENTS;
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}
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else
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value->data[0].v_pointer = node->copy (collect_values[0].v_pointer);
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}
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return NULL;
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}
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static gchar*
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boxed_proxy_lcopy_value (const GValue *value,
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guint n_collect_values,
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GTypeCValue *collect_values,
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guint collect_flags)
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{
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gpointer *boxed_p = collect_values[0].v_pointer;
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if (!boxed_p)
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return g_strdup_printf ("value location for `%s' passed as NULL", G_VALUE_TYPE_NAME (value));
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if (!value->data[0].v_pointer)
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*boxed_p = NULL;
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else if (collect_flags & G_VALUE_NOCOPY_CONTENTS)
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*boxed_p = value->data[0].v_pointer;
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else
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{
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BoxedNode key, *node;
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key.type = G_VALUE_TYPE (value);
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node = g_bsearch_array_lookup (boxed_bsa, &boxed_bconfig, &key);
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*boxed_p = node->copy (value->data[0].v_pointer);
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}
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return NULL;
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}
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GType
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g_boxed_type_register_static (const gchar *name,
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GBoxedCopyFunc boxed_copy,
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GBoxedFreeFunc boxed_free)
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{
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static const GTypeValueTable vtable = {
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boxed_proxy_value_init,
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boxed_proxy_value_free,
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boxed_proxy_value_copy,
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boxed_proxy_value_peek_pointer,
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"p",
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boxed_proxy_collect_value,
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"p",
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boxed_proxy_lcopy_value,
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};
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static const GTypeInfo type_info = {
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0, /* class_size */
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NULL, /* base_init */
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NULL, /* base_finalize */
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NULL, /* class_init */
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NULL, /* class_finalize */
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NULL, /* class_data */
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0, /* instance_size */
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0, /* n_preallocs */
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NULL, /* instance_init */
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&vtable, /* value_table */
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};
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GType type;
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g_return_val_if_fail (name != NULL, 0);
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g_return_val_if_fail (boxed_copy != NULL, 0);
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g_return_val_if_fail (boxed_free != NULL, 0);
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g_return_val_if_fail (g_type_from_name (name) == 0, 0);
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type = g_type_register_static (G_TYPE_BOXED, name, &type_info, 0);
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/* install proxy functions upon successfull registration */
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if (type)
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{
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BoxedNode key;
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key.type = type;
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key.copy = boxed_copy;
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key.free = boxed_free;
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boxed_bsa = g_bsearch_array_insert (boxed_bsa, &boxed_bconfig, &key);
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}
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return type;
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}
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gpointer
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g_boxed_copy (GType boxed_type,
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gconstpointer src_boxed)
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{
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GTypeValueTable *value_table;
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gpointer dest_boxed;
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g_return_val_if_fail (G_TYPE_IS_BOXED (boxed_type), NULL);
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g_return_val_if_fail (G_TYPE_IS_ABSTRACT (boxed_type) == FALSE, NULL);
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g_return_val_if_fail (src_boxed != NULL, NULL);
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value_table = g_type_value_table_peek (boxed_type);
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if (!value_table)
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g_return_val_if_fail (G_TYPE_IS_VALUE_TYPE (boxed_type), NULL);
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/* check if our proxying implementation is used, we can short-cut here */
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if (value_table->value_copy == boxed_proxy_value_copy)
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{
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BoxedNode key, *node;
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key.type = boxed_type;
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node = g_bsearch_array_lookup (boxed_bsa, &boxed_bconfig, &key);
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dest_boxed = node->copy ((gpointer) src_boxed);
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}
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else
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{
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GValue src_value, dest_value;
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/* we heavily rely on third-party boxed type value vtable
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* implementations to follow normal boxed value storage
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* (data[0].v_pointer is the boxed struct, and
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* data[1].v_uint holds the G_VALUE_NOCOPY_CONTENTS flag,
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* rest zero).
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* but then, we can expect that since we layed out the
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* g_boxed_*() API.
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* data[1].v_uint&G_VALUE_NOCOPY_CONTENTS shouldn't be set
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* after a copy.
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*/
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/* equiv. to g_value_set_static_boxed() */
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value_meminit (&src_value, boxed_type);
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src_value.data[0].v_pointer = (gpointer) src_boxed;
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src_value.data[1].v_uint = G_VALUE_NOCOPY_CONTENTS;
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/* call third-party code copy function, fingers-crossed */
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value_meminit (&dest_value, boxed_type);
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value_table->value_copy (&src_value, &dest_value);
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/* double check and grouse if things went wrong */
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if (dest_value.data[1].v_ulong)
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g_warning ("the copy_value() implementation of type `%s' seems to make use of reserved GValue fields",
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g_type_name (boxed_type));
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dest_boxed = dest_value.data[0].v_pointer;
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}
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return dest_boxed;
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}
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void
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g_boxed_free (GType boxed_type,
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gpointer boxed)
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{
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GTypeValueTable *value_table;
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g_return_if_fail (G_TYPE_IS_BOXED (boxed_type));
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g_return_if_fail (G_TYPE_IS_ABSTRACT (boxed_type) == FALSE);
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g_return_if_fail (boxed != NULL);
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value_table = g_type_value_table_peek (boxed_type);
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if (!value_table)
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g_return_if_fail (G_TYPE_IS_VALUE_TYPE (boxed_type));
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/* check if our proxying implementation is used, we can short-cut here */
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if (value_table->value_free == boxed_proxy_value_free)
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{
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BoxedNode key, *node;
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key.type = boxed_type;
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node = g_bsearch_array_lookup (boxed_bsa, &boxed_bconfig, &key);
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node->free (boxed);
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}
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else
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{
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GValue value;
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/* see g_boxed_copy() on why we think we can do this */
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value_meminit (&value, boxed_type);
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value.data[0].v_pointer = boxed;
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value_table->value_free (&value);
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}
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}
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gpointer
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g_value_get_boxed (const GValue *value)
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{
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g_return_val_if_fail (G_VALUE_HOLDS_BOXED (value), NULL);
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g_return_val_if_fail (G_TYPE_IS_VALUE (G_VALUE_TYPE (value)), NULL);
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return value->data[0].v_pointer;
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}
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gpointer
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g_value_dup_boxed (const GValue *value)
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{
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g_return_val_if_fail (G_VALUE_HOLDS_BOXED (value), NULL);
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g_return_val_if_fail (G_TYPE_IS_VALUE (G_VALUE_TYPE (value)), NULL);
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return value->data[0].v_pointer ? g_boxed_copy (G_VALUE_TYPE (value), value->data[0].v_pointer) : NULL;
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}
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static inline void
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value_set_boxed_internal (GValue *value,
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gconstpointer const_boxed,
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gboolean need_copy,
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gboolean need_free)
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{
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BoxedNode key, *node;
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gpointer boxed = (gpointer) const_boxed;
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if (!boxed)
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{
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/* just resetting to NULL might not be desired, need to
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* have value reinitialized also (for values defaulting
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* to other default value states than a NULL data pointer),
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* g_value_reset() will handle this
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*/
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g_value_reset (value);
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return;
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}
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key.type = G_VALUE_TYPE (value);
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node = g_bsearch_array_lookup (boxed_bsa, &boxed_bconfig, &key);
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if (node)
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{
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/* we proxy this type, free contents and copy right away */
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if (value->data[0].v_pointer && !(value->data[1].v_uint & G_VALUE_NOCOPY_CONTENTS))
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node->free (value->data[0].v_pointer);
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value->data[1].v_uint = need_free ? 0 : G_VALUE_NOCOPY_CONTENTS;
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value->data[0].v_pointer = need_copy ? node->copy (boxed) : boxed;
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}
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else
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{
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/* we don't handle this type, free contents and let g_boxed_copy()
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* figure what's required
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*/
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if (value->data[0].v_pointer && !(value->data[1].v_uint & G_VALUE_NOCOPY_CONTENTS))
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g_boxed_free (G_VALUE_TYPE (value), value->data[0].v_pointer);
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value->data[1].v_uint = need_free ? 0 : G_VALUE_NOCOPY_CONTENTS;
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value->data[0].v_pointer = need_copy ? g_boxed_copy (G_VALUE_TYPE (value), boxed) : boxed;
|
|
}
|
|
}
|
|
|
|
void
|
|
g_value_set_boxed (GValue *value,
|
|
gconstpointer boxed)
|
|
{
|
|
g_return_if_fail (G_VALUE_HOLDS_BOXED (value));
|
|
g_return_if_fail (G_TYPE_IS_VALUE (G_VALUE_TYPE (value)));
|
|
|
|
value_set_boxed_internal (value, boxed, TRUE, TRUE);
|
|
}
|
|
|
|
void
|
|
g_value_set_static_boxed (GValue *value,
|
|
gconstpointer boxed)
|
|
{
|
|
g_return_if_fail (G_VALUE_HOLDS_BOXED (value));
|
|
g_return_if_fail (G_TYPE_IS_VALUE (G_VALUE_TYPE (value)));
|
|
|
|
value_set_boxed_internal (value, boxed, FALSE, FALSE);
|
|
}
|
|
|
|
void
|
|
g_value_set_boxed_take_ownership (GValue *value,
|
|
gconstpointer boxed)
|
|
{
|
|
g_value_take_boxed (value, boxed);
|
|
}
|
|
|
|
void
|
|
g_value_take_boxed (GValue *value,
|
|
gconstpointer boxed)
|
|
{
|
|
g_return_if_fail (G_VALUE_HOLDS_BOXED (value));
|
|
g_return_if_fail (G_TYPE_IS_VALUE (G_VALUE_TYPE (value)));
|
|
|
|
value_set_boxed_internal (value, boxed, FALSE, TRUE);
|
|
}
|
|
|
|
#define __G_BOXED_C__
|
|
#include "gobjectaliasdef.c"
|